Photographic material

Abstract

In order to be able to cast additional layers on auxiliary layers of photographic materials immediately after the latter have been cast without encountering any difficulties as regards uniformity of the cast layer and wet adherence due to incomplete conversion of the gelatine from the sol to the gel form, the auxiliary layer must contain an effective quantity of at least one compound obtained by the reaction of trihydric to hexahydric alcohols with propylene oxide.

What is claimed is: 
     
       1. Photographic material containing at least one auxiliary layer and at least one light sensitive emulsion layer, characterised in that the auxiliary layer contains at least one compound which has been obtained by the reaction of a trihydric to hexahydric alcohol with propylene oxide and has an OH content of from 7 to 15% by weight. 
     
     
       2. Photographic material according to claim 1, characterised in that the reaction products have an OH content of from 9.5 to 12.5% by weight. 
     
     
       3. Photographic material according to claim 1, characterised in that the tri- to hexahydric alcohols contain 3 to 6 carbon atoms. 
     
     
       4. Photographic material according to claim 1, characterised in that the reaction products are used together with gelatine in a ratio by weight of from 0.1:1 to 10:1. 
     
     
       5. Photographic material according to claim 4, characterised in that the gelatine is partly replaced by other high molecular weight, water soluble polymers. 
     
     
       6. Polyethylene coated paper containing a substrate layer and at least one light sensitive silver halide emulsion layer, characterised in that the substrate layer contains at least one compound which has been obtained by the reaction of a trihydric to hexahydric alcohol with propylene oxide and has an OH content of from 7 to 15% by weight.